Unscrew(v) Masturbating with one's left hand; the opposite of screwing yourself.
"Instead of screwing himself, Johny decided to use his left hand and furiously unscrew himself."
by CLiFF June 03, 2004
To suck the semen out of a girl's vagina after jizzing inside of it.
After realizing he made a mistake, Stevenson promptly unscrewed the fat girl from down the hall.
by Red Joseph April 16, 2015